Thanks... I need to convey this info to a semi-mechanical friend who
is 3000 miles from me so I don't have a car to look at... is the
connection in a known location or does he have to just hunt around for
it... or is it the sort of thing where you have to drop the tank?
thanks for any additional info,

Is it only the fuel gauge that goes wonky?
The "instrument panel voltage regulator" powers it, along with the temperature
and oil pressure gauges. If the regulator goes bad, all three gauges will give
incorrect readings, either spiking or dropping to zero. The regulator is a little
metal box that snaps onto the back of the cluster, much like a 9V battery.

I'm going to go with your answer on this one. On an '88 Cougar that I
used to drive, the gas gauge would peg out and the temp gauge would
peg out at the same time. It only happened about once every 3 or 4
months and it would only last about 15-20 seconds and then all was
fine again. It was the instrument panel regulator.

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